Keith, thank you for the compliment.* It took a bit of searching a I'm not all that familiar with the plants that grow where you live.* I have been to South America and have seen many trees and shrubs there, so that helped a bit.
Now you're not going to like my answer, but I don't think you should plant a tree there unless it's a dwarf, and I mean dwarf.* Look at the picture again.* It looks like the tree cuts your house in half.* I would suggest something narrow and columnar or a small shrub.* Large trees should frame a house, so they are better placed to the outer edge of the house.
I get your hardiness zone as 9.* You can check it here.
By the way, the 'planter' you have your tree in is called a tree coffin by arborists.* That is why your magnolia is struggling.*
I don't know if this tree can stand the heat where you are as I haven't found the limit for it's warmer zones, but the size and form are what I'm referring to. It's not evergreen either.* I would also need to check into the root situation with this tree.* Many maples are notorius for large root systems.
Acer saccharum 'Barrett Cole'* aka Apollo maple.
Let me know what you think and I'll research some trees for you.*
Oh, I forgot to ask,* What are the sun conditions there?* How many hours of sun?* Which way does the house face?
When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant.